Gibberellin was first extracted from ..................

Gibberella fujikuroi

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Solution

The correct option is A Gibberella fujikuroi
Gibberellins are plant hormones that regulate growth and influence various developmental processes, including stem elongation, germination, dormancy, flowering, sex expression, enzyme induction and leaf and fruit senescence. Gibberellin was first recognized in 1926 by a Japanese scientist, Elichi Kurosawa studying bakane, the 'foolish seedling disease' in rice. It was first isolated in 1935 by Teijiro Yabuta and Sumuki from fungal strains provided by Kurosawa from Gibberella fujikori. Yabuta named the isolate as gibberellin.

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Question 16

Gibberellins were first discovered in Japan when rice plants were suffering from bakane (the foolish seedling disease) caused by a fungus Gibberella fujikuroi.
Give two functions of this phytohormone.

Which property of gibberellin caused foolish seedling disease in rice?

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